井筒十字中线标定 setting-out of shaft center: 井筒中心标定setting-out line: 测定的线; 划定的线through feed setting out machine: 通过式伸展机center line through plate: 中线贯通板; 中纵通板pto shaft center line: 动力输出轴轴心线下载手机词典可随时随地查词查翻译